Are you attempting to send email via a domain other than your RR account? I have received a similar error message when I attempt to send email using my domain's SMTP account instead of the RR account. What I had to do to solve that situation was send all outbound email via my RR account. - Michienne -----Original Message----- From: owner-kclug@marauder.illiana.net [mailto:owner-kclug@marauder.illiana.net]On Behalf Of paul@kcnetcare.com Sent: Tuesday, April 01, 2003 1:00 PM To: kclug@kclug.org Subject: Road Runner 550 Unable to Relay Error Anyone ever get the 550 Unable to Relay Error message while using your RR account for outgoing e-mail?